Smoke-consuming stove



(No Mdem" E. L. DODGE.

, SMOKE GONSUMING STOVB. l No. 285,397. Patented Sept. 25, 1883..

furnace above the re therein to promote com- UNITED STATES ATENT OFFICE0EDWIN L. DODGE, OF SOMEEVILLE, MASSACHUSETTS.

SMOKE-CONSUMING STOVE.v

SPECIFICATION formingpart of 4Letters Patent No. 285,397, datedSeptember 25, 1883.

Application led December 14, 1882. (No model.)

To ali w/wm it may concern:

Be it known that I, EDWIN L. DODGE, a citizen of the United States,residing at Somerville, in the county of Middlesex and State ofMassachusetts, have invented a new and useful Improvement in Stoves andFurnaces, of which the following is a full, clear, and ex actdescription.

My invention relates to the means of introdueing a supply of heated airinto a stove or bustion of the gases arising from the imperfectcombustion of the fuel. It affordsa means of directing, conducting, anddischarging currents of intensely-heated air with great velocitydownward through and .among said gases as they rise, and toward and uponthe surface of the re, by means of which the oxygen of the air isenabled to rapidly and thoroughly combine with said gases while both arein the condition of greatest heat.

It consists in using as conduits for the air a se 1ies of tubes' whichare exposed to the direct action of the fire, being separated from itonly, if at all, by the ordinary fire-brick lining by making them a partof the lire-pot. The tubes are Siphon-like in form, being bent inward attheir upper ends over the lire and downward toward it. The air entersthese tubes from the outside of and through the base of the stove, andis intensely heated by the direct action of the iire on the severaltubes, and, being confined by the tube on all sides, is forced to ascendwith great velocity through the tubes, and is led through the bend ofthe tube and its downward-proj ecting arm and forced through the openend thereof with its velocity little diminished, among and through thesaid gases, and upon the surface of theiire without having parted withany of its heat.

In the accompanying drawings, Figure 1 shows a vertical section of astove which contains my described apparatus. a a are the Siphon-shapedair-tubes, which are shown making the greater portion of the fire-pot,and held in place and connected by the remaining metal of said pot, ofwhich l is the fire-brick or other lining. The arrows indicate thecurrents of air entering the tubes from the outside at the base of thestove, and passing upward by the fire and over and downward through andout of the short arm of the siphon `toward and upon the surface of there F.

Fig. 2 shows a horizontal section of said stove on the line C D, Fig. l,and shows said tubes constituting a portion of the hre-pot, vand havinga portion-of the surface of each tube in contact with the lining l. Fig.3 is ahorizontal section of said stove at the line A B, Fig. 1, andshows a top plan view of the said tubes a a.

I am aware that stoves have been made with a chamber over the fire toreceive and hold heated air, with perforations in the bottom of saidchamber to permit the air it contains to escape downward toward thefire; but such device is an imperfect means of supplying'oxygen forcombustion of the gases arising from the re, because the air in saidchamber loses a considerable part of its heat before it leaves saidchamber, and has little or no tendency to desceiid with velocity towardthe fire through the gases, and it provides no means for conducting anddirecting the air in the desired direction. All thesel defects areremedied by my described invention.

I claimi 1. The continuous air-conduits a a, arranged around the iire,their lower portion forming a portion of the iirefpot, and adapted toreceive and heat and lead upward and over and discharge downward withvelocity currents of air toward the surface of the fire in the fire-pot,in the manner and for the purpose Aset forth.

2. The series of continuous tubes a a, forming a portion of thevfire-pot, and extended above the iire-pot and bent over and downward,and adapted to secure heat and lead and discharge at various elevationscurrents of air, and constructed as described and shown, and for thepurpose set forth.

EDWIN L. DODGE.

